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cup flash -point of less than one hundred forty (140) degrees Fahrenheit (sixty (60) <br />degrees Celsius) using test met.ods specified in 40 CFR 261.21. <br />(b) Any solid or viscous subs cels} in amounts that will cause obstruction to the flow in the <br />sanitary sewer or interfere with the operation of the POTsuch as, but not limited to: animal <br />and vegetable grease, fat, or oil in excess of specific linuit.tions as set forth in this article, <br />garbage other than comminuted garbage which has been reduced to a particle size no greater <br />than one-half (V2) inch. in any dimension, rocks, sand, glass, metal, waste paper, grass <br />clippings, wood, plastic, feathers, bones, grinding and polishing wastes, tar, asphalt residues, <br />rags, or any material that has been determined by the city to cause an obstruction. <br />Note: The supervisor, city engineer or their authorized representative is entitled to review and <br />approve the installation of any equipment to condition waste or grind garbage with a motor or <br />driving means of three-fourths (%) horsepower or greater. <br />(c) Any wastewater or other substance having a pH lower than five and one-half (5.5) or higher <br />than nine and one-half (9.5) or having other corrosive properties capable of causing damage <br />or hazard to the structures, equipment and/or personnel of the POT W,err the general public. <br />Excursions of the above limits may be acceptable as follows: <br />Maximum Excursion Duration <br />0.5 pH unit not to exceed 60 in. <br />1.0 p1l unit not to exceed 30 min. <br />1.5 pH unit not to exceed 10 min. <br />Such excursions shall be at the discretion of the supervisor. <br />(d) Any petroleum based oil. or grease except in trace amounts and as specified in this article, non - <br />biodegradable cutting oil, or any other petroleum-based on mineral oil based material that will <br />cause pass through or interference with the POTW. <br />(e) Any discharge that results in toxic gases, vapors, or fumes within the POT' W in a quantity that <br />may endanger the health or safety of POTW personnel or the general public, or create a public <br />nuisance. <br />(f) Any discharge to the P1W having a temperature which will inhibit biological activity in the <br />POT' W treatment plant resulting in interference, cause damage to the POTW, increase the <br />temperature of the total treatment plant influent at a to of ten (10) degrees Fahrenheit or <br />more per hour, or cause the to treatment plant influent to exceed one -hundred four (104) <br />degrees Fahrenheit (forty (40) degrees Celsius). <br />Page 31 of 45 <br />